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EP2560031A1 - Optisches kunststoffprodukt und kunststofflinse für brillen - Google Patents

Optisches kunststoffprodukt und kunststofflinse für brillen Download PDF

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Publication number
EP2560031A1
EP2560031A1 EP11783547A EP11783547A EP2560031A1 EP 2560031 A1 EP2560031 A1 EP 2560031A1 EP 11783547 A EP11783547 A EP 11783547A EP 11783547 A EP11783547 A EP 11783547A EP 2560031 A1 EP2560031 A1 EP 2560031A1
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EP
European Patent Office
Prior art keywords
layer
plastic
refractive index
lens
layers
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Granted
Application number
EP11783547A
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English (en)
French (fr)
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EP2560031A4 (de
EP2560031B1 (de
Inventor
Tsuyoshi Fukagawa
Hirotoshi Takahashi
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Tokai Optical Co Ltd
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Tokai Optical Co Ltd
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Publication of EP2560031A4 publication Critical patent/EP2560031A4/de
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041—Lenses
    • G02B1/043—Contact lenses

Definitions

  • the present invention relates to a plastic optical product and a plastic lens for spectacles that have an optical multilayer film but are excellent in heat resistance.
  • an anti-reflective film including a metal oxide film is formed on a plastic substrate or on a hard coat film of the substrate.
  • the metal oxide film has a smaller coefficient of thermal expansion than those of the plastic substrate and the hard coat film.
  • the metal oxide film cannot follow the deformation of the plastic substrate or the hard coat film due to their comparatively large thermal expansion and this may generate cracks on the anti-reflective film.
  • Patent Document 1 In order to improve such characteristics against heat and to impart heat resistance, for example, as disclosed in Patent Document 1, it is known that a composite layer including at least two metal oxide layers that contain the same metallic element but have different oxygen contents from each other is included in an anti-reflective film.
  • the composite layer in order to impart heat resistance while maintaining the anti-reflection properties, the composite layer is disposed away from a substrate side (hard coating side) (via a common anti-reflective multilayer film structure).
  • the common anti-reflective multilayer film structure cannot follow the deformation due to thermal expansion and the heat resistance is not much improved.
  • a round lens is not used as it is and is usually edged to have a certain outer shape such as an ellipsoidal shape, and then the edged lenses are inserted in a frame to be used.
  • the lens in Patent Document 1 cannot be considered to have significantly improved heat resistance after inserted in a frame.
  • Patent Document 1 Japanese Laid-open Patent Application, Publication No. 2009-128820 (No. JP 2009-128820 A )
  • an object of the present invention is to provide a plastic optical product and a plastic lens for spectacles that have an optical multilayer film but are excellent in heat resistance.
  • an invention according to claim 1 is characterized in that an optical multilayer film having seven layers is formed on a surface of a plastic substrate directly or with an interlayer interposed therebetween; with a layer on the plastic substrate side being a low refractive index layer, low refractive index layers and high refractive index layers are alternately disposed; and at least the high refractive index layer at the center contains substoichiometric titanium oxide.
  • the invention in order to achieve an object of providing a product that has a simple structure but is excellent in heat resistance in addition to the object mentioned above, the invention is characterized in that the high refractive index layer at the center alone contains substoichiometric titanium oxide.
  • each of the high refractive index layers is formed of substoichiometric titanium oxide or titanium dioxide.
  • an invention according to claim 4 is a plastic lens for spectacles including the plastic optical product of the invention.
  • the plastic lens for spectacles is characterized in that the plastic substrate is a plastic lens substrate for spectacles, the interlayer is a hard coat film, and the optical multilayer film is an anti-reflective film.
  • At least the center layer in the optical multilayer film contains substoichiometric titanium oxide. This can improve the following performance of the optical multilayer film to a plastic substrate when heat is applied, while maintaining good anti-reflective properties and other properties of the optical multilayer film. Therefore, an optical member excellent in heat resistance can be provided.
  • FIG. 1 is a partial sectional view of a surface of a plastic optical product of the present invention.
  • an interlayer 2 and an optical multilayer film 3 are stacked in this order.
  • the interlayer 2 may not be provided and the optical multilayer film 3 may be directly stacked on the plastic substrate 1, and a water repellent film or the like may be further formed on the optical multilayer film 3.
  • Examples of the optical product include spectacle lenses, camera lenses, projector lenses, binocular lenses, telescope lenses, and various filters.
  • the material of the plastic substrate 1 include a polyurethane resin, an episulfide resin, a polycarbonate resin, an acrylic resin, a polyethersulfone resin, a poly(4-methylpentene-1) resin, and a diethylene glycol bis(allyl carbonate) resin.
  • the interlayer 2 corresponds to, for example, a hard coat film provided on a surface of the plastic substrate 1.
  • the hard coat film is made of, for example, an organosiloxane compound, other organic silicon compounds, or an acrylic compound.
  • the interlayer 2 may include a primer layer as an underlayer of the hard coat film.
  • the primer layer is formed of, for example, a polyurethane resin, an acrylic resin, a methacrylic resin, or an organosilicon resin.
  • the optical multilayer film 3 is typically formed by, for example, vacuum deposition or sputtering and is formed by alternately stacking a low refractive index layer and a high refractive index layer each including a metal oxide.
  • the low refractive index layer is formed using, for example, silicon dioxide (SiO 2 ) and the high refractive index layer is formed using, for example, titanium oxide.
  • the low refractive index material and the high refractive index material except substoichiometric titanium oxide include known materials such as Al 2 O 3 (dialuminum trioxide), Y 2 O 3 (diyttrium trioxide), ZrO 2 (zirconium dioxide), Ta 2 O 5 (tantalum pentoxide), HfO 2 (hafnium dioxide), and Nb 2 O 5 (niobium pentoxide).
  • the first layer is the low refractive index layer
  • the second layer is the high refractive index layer.
  • the optical multilayer film 3 includes stacked seven layers from the first layer to the seventh layer in this manner. Examples of the function of the optical multilayer film 3 include an anti-reflective film, a mirror, a half mirror, an ND filter, and a band-pass filter.
  • the center fourth layer contains insufficiently oxidized titanium oxide (substoichiometric titanium oxide, TiOx, x ⁇ 2).
  • the fourth layer alone contains TiOx and the second and sixth layers contain titanium dioxide (TiO 2 ) (Example 1)
  • the second and fourth layers contain TiOx and the sixth layer contains TiO 2 (Example 2)
  • the fourth and sixth layers contain TiOx and the second layer contains TiO 2 (Example 3)
  • the second, fourth, and sixth layers contain TiOx (Example 4).
  • TiOx is formed from oxygen in a (slightly) insufficient equivalent with respect to titanium.
  • a titanium oxide such as trititanium pentoxide is evaporated while feeding oxygen gas, thereby depositing a substoichiometric titanium oxide on the plastic substrate 1.
  • the substoichiometric titanium oxide is formed by controlling the feeding condition (for example, feeding amount and pressure during film formation) of the oxygen gas (depending on the amount of titanium oxide used).
  • an inert gas may be fed together with oxygen gas and the feeding condition of the inert gas may be controlled, thereby controlling the insufficient oxidation amount.
  • ion assistance in which an oxygen ion is introduced in combination while satisfying a film formation condition, may be appropriately performed at a predetermined accelerating voltage or a predetermined accelerating current.
  • another ion such as an argon ion may be used in place of the oxygen ion.
  • plasma treatment may be performed.
  • the optical multilayer film 3 has a five-layer structure or a nine-layer structure
  • the low refractive index layer is disposed at the center in the whole layers.
  • the optical multilayer film 3 has a three-layer structure or an eleven-layer structure
  • the high refractive index layer is disposed at the center.
  • the three-layer structure cannot sufficiently impart various functions such as the anti-reflective function.
  • the nine or more-layer structure requires time and efforts for the formation of the film, and therefore, such a structure is not practical.
  • Examples 1 to 4 were prepared as examples and Comparative Examples 1 to 8 were prepared as comparative examples. These are all plastic lenses and are different from each other only in the structure of an optical multilayer film.
  • Each optical multilayer film of Comparative Examples 1 to 4 included seven layers in total and each optical multilayer film of Comparative Examples 5 to 8 included five layers in total.
  • each high refractive index layer contained TiO 2 ; in Comparative Example 2, the second high refractive index layer alone contained TiOx; in Comparative Example 3, the sixth high refractive index layer alone contained TiOx; and in Comparative Example 4, the second and sixth high refractive index layers alone contained TiOx.
  • a round lens produced as the description below or a lens obtained by edging the round lens was used as each plastic lens substrate of Examples 1 to 4 and Comparative Examples 1 to 8.
  • the round lens was produced as follows. With respect to materials in a total amount of 100 parts by weight including 50 parts by weight of norbornene diisocyanate, 25 parts by weight of pentaerythritol tetrakis(3-mercaptopropionate), and 25 parts by weight of bis(mercaptomethyl)-3,6,9-trithia-1,11-undecanediol, 0.03 part by weight of dibutyltin dichloride was added as a catalyst to prepare a homogeneous solution.
  • the solution was poured in a mold for lens and the temperature was raised from 20°C to 130°C over 20 hours, thereby curing the materials to produce a round lens substrate.
  • the plastic lens substrate had a refractive index of 1.594, an Abbe number of 42, and a lens power of -3.00.
  • a hard coating solution described below (including a base solution and various additives) was applied onto the plastic lens substrate by dipping, was dried in an air stream, and was cured by heating at 120°C for an hour and a half, thereby forming a hard coat film having a film thickness of 3.0 micrometers ( ⁇ m).
  • the base solution in the hard coating solution was prepared as follows. In a total amount of 283 parts by weight, 11 parts by weight of tetraethoxysilane, 76 parts by weight of ⁇ -glycidoxypropyltrimethoxysilane, and 22 parts by weight of ⁇ -glycidoxypropylmethyldiethoxysilane were added to 150 parts by weight of methanol. To the mixture on ice with stirring, 24 parts by weight of 0.01 normal concentration (N) hydrochloric acid was added dropwise, thereby hydrolyzing the material. The mixture was further stirred at 5°C for about 24 hours to prepare the base solution.
  • N normal concentration
  • the hard coating solution was prepared as follows. With respect to 283 parts by weight of the base solution, 192 parts by weight of methanol dispersed titania sol (HINEX AB20 manufactured by JGC Catalysts and Chemicals Ltd.), 0.60 part by weight of a silicon surfactant (L-7604 manufactured by Dow Corning Toray Co., Ltd.) as a leveling agent, 20.02 parts by weight of itaconic acid, and 8.33 parts by weight of dicyandiamide were added, and the whole was further stirred at 5°C for about 24 hours, thereby preparing the hard coating solution.
  • the hard coating solution had a solid content of about 30%.
  • each layer was sequentially formed by vacuum deposition (odd-numbered layers: SiO 2 , even-numbered layers: titanium oxide).
  • each even-numbered layer was formed as follows.
  • Oxygen gas was introduced into a vacuum chamber so that the pressure during film formation reached a pressure determined by whether the oxidation was insufficient or not (or by an insufficient degree), and TiO 2 or TiOx was deposited using trititanium pentoxide as a deposition material.
  • the reaction pertaining to the film formation is as shown below. Ti 3 O 5 + ⁇ O2 ⁇ 3TiOx
  • the pressures during film formation of the TiOx layers (substoichiometric titanium oxide layers) of Examples 1 to 4 were 5.5E-3 Pascal (Pa), 6.0E-3 Pa, 6.0E-3 Pa, and 6.0E-3 Pa, respectively.
  • each number following "E” is regarded as the exponent of 10 and the exponential figure (digit number) is multiplied by the number followed by "E”.
  • the pressure during film formation of each TiO 2 layer was 1.0E-2 Pa.
  • Comparative Examples 2 to 4 the pressure during film formation of each TiOx layer was 5.5E-3 Pa, and in Comparative Examples 6 to 8, the pressure during film formation of each TiOx layer was 6.0E-3 Pa. In Comparative Examples 1 to 7, the pressure during film formation of each TiO 2 layer was 1.0E-2 Pa.
  • each film structure of Examples 1 to 4 is shown in [Table 1]
  • each film structure of Comparative Examples 1 to 4 is shown in [Table 2]
  • each film structure of Comparative Examples 5 to 8 is shown in [Table 3].
  • the substoichiometric titanium oxide is shown by "TiOx, insufficient oxidation”.
  • Example 1 Example 2
  • Example 3 Example 4 AR film structure Physical film thickness [nm] 1st layer 25.91 SiO2 SiO2 SiO2 SiO2 2nd layer 13.28 TiO2 TiOx insufficient oxidation TiO2 TiOx insufficient oxidation 3rd layer 38.07 SiO2 SiO2 SiO2 SiO2 4th layer 41.50 TiOx insufficient oxidation TiOx insufficient oxidation TiOx insufficient oxidation 5th layer 19.83 Si02 SiO2 SiO2 SiO2 6th layer 36.96 TiO2 TiO2 TiOx insufficient oxidation TiOx insufficient oxidation 7th layer 96.31 SiO2 SiO2 SiO2 SiO2 Air side - - - - [Table 2] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 AR film structure Physical film thickness [nm] 1st layer 25.91 SiO2 SiO2 SiO2 2nd layer 13.28 TiO2
  • a round lens after anti-reflective film formation was placed in an oven at 60°C for 5 minutes, and then was taken out. The presence or absence of abnormal changes such as cracks was observed in the appearance. When no appearance defect was observed, the lens was placed in an oven in a similar manner once again and the appearance was observed. This operation was repeated until the total oven treatment time reached 30 minutes. When no appearance defect was observed even after that, the temperature of the oven was raised by 10°C, and heating every 5 minutes and the appearance observation were repeated until the total oven treatment time reached 30 minutes in a similar manner. This procedure was repeated until the appearance defect was observed.
  • Example 1 Example 2
  • Example 3 Example 4 4th layer, substoichiometric titanium oxide layer 2nd and 4th layers, substoichiometric titanium oxide laver 4th and 6th layers, substoichiometric titanium oxide laver 2nd, 4th, and 6th layers, substoichiometric titanium oxide laver Round lens heat resistance 60°C ⁇ ⁇ ⁇ ⁇ ⁇ 70°C ⁇ ⁇ ⁇ ⁇ 80°C ⁇ ⁇ ⁇ ⁇ 90°C ⁇ ⁇ ⁇ ⁇ 100°C ⁇ ⁇ ⁇ ⁇ 110°C ⁇ ⁇ ⁇ ⁇ 120°C ⁇ ⁇ ⁇ 130°C ⁇ ⁇ ⁇ ⁇ Acceleration heat resistance of frame (two lenses)
  • Initial state of acceleration ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 60°C ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 70°C ⁇ ⁇ ⁇ ⁇ ⁇ 80°C ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
  • Two plastic lenses that were obtained by edging round lenses were inserted into left and right positions of a metal spectacle frame.
  • the frame was placed in a constant temperature and humidity environment at 60°C and 95% for three days, and the same heat resistance test was performed as the test for round lenses. However, the heating time at each temperature was 20 minutes. When no appearance defect was observed, the frame was immediately heated at a next higher temperature. In the heating at 90°C or more, the temperature was raised by 5°C. When an appearance defect was observed in one of the left and right lenses but no appearance defect was observed in the other, the test was continued. When lenses in a frame is placed in the constant temperature and humidity environment for three days, the state after the lenses are used for a long period of time can be achieved in a short period of time.
  • each test result of Examples 1 to 4 is shown in lower lines in [Table 4]
  • each test result of Comparative Examples 1 to 4 is shown in lower lines in [Table 5]
  • each test result of Comparative Examples 5 to 8 is shown in upper lines in [Table 6].
  • the result of each left lens was shown in a corresponding left column and the result of each right lens was shown in a corresponding right column.
  • Example 1 Example 2
  • Example 3 Example 4 4th layer, substoichiometric titanium oxide layer 2nd and 4th layers, substoichiometric titanium oxide layer 4th and 6th layers, substoichiometric titanium oxide layer 2nd, 4th, and 6th layers, substoichiometric titanium oxide layer Weather resistant adhesiveness (convex face/concave face) 0hr ⁇ ⁇ ⁇ ⁇ 60hr ⁇ ⁇ ⁇ ⁇ 120hr ⁇ ⁇ ⁇ ⁇ 180hr ⁇ ⁇ ⁇ 240hr ⁇ ⁇ ⁇ Artificial sweat Acid ⁇ ⁇ ⁇ ⁇ Alkali ⁇ ⁇ ⁇ ⁇ Boiling Pure water ⁇ ⁇ ⁇ ⁇ ⁇
  • Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Without substoichiometric titanium oxide layer 2nd layer, substoichiometric titanium oxide layer 6th layer, substoichiometric titanium
  • a round lens was immersed in each of an acidic artificial sweat liquid and an alkaline artificial sweat liquid for 24 hours and the state of the optical multilayer film was observed.
  • the acidic artificial sweat liquid was prepared by dissolving 10 grams (g) of sodium chloride, 2,5 g of sodium hydrogen phosphate dodecahydrate, and 1.0 g of lactic acid in 1 liter of pure water.
  • the alkaline artificial sweat liquid was prepared by dissolving 10 g of sodium chloride, 2.5 g of sodium hydrogen phosphate dodecahydrate, and 4.0 g of ammonium carbonate in 1 liter of pure water.
  • a round lens was immersed in boiling tap water or boiling pure water for 10 minutes, and then was taken out. The lens surface was observed.
  • Each test result of Examples 1 to 4 is shown in lower lines in [Table 7]
  • each test result of Comparative Examples 1 to 4 is shown in lower lines in [Table 8]
  • each test result of Comparative Examples 5 to 8 is shown in lower lines in [Table 9], in the same manner as in the case of the resistance to sweat. The results reveal that each lens had excellent boiling resistance.
  • the obtained lens had heat resistance and the like in the same manner as in the case where SiO 2 and TiO 2 were used.
  • a lens maintains good adhesion properties, resistance to sweat, and boiling resistance equivalent to those of a lens that includes a TiO 2 layer alone as the high refractive index material and a lens that includes a TiOx layer in addition to the center layer.
  • the lens has uniformly controlled stress balance in the entire film area and good following performance to stress change of a substrate or an interlay er, and can suppress appearance defects such as cracks for a long period of time even after the lens is edged or is inserted into a frame.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Inorganic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Surface Treatment Of Optical Elements (AREA)
  • Engineering & Computer Science (AREA)
  • Eyeglasses (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physical Vapour Deposition (AREA)
  • Laminated Bodies (AREA)
EP11783547.0A 2010-05-20 2011-05-17 Optisches kunststoffprodukt und kunststofflinse für brillen Active EP2560031B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010116625A JP5413978B2 (ja) 2010-05-20 2010-05-20 プラスチック光学製品及び眼鏡プラスチックレンズ
PCT/JP2011/061308 WO2011145613A1 (ja) 2010-05-20 2011-05-17 プラスチック光学製品及び眼鏡プラスチックレンズ

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EP2560031A4 EP2560031A4 (de) 2013-11-06
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US (1) US9022561B2 (de)
EP (1) EP2560031B1 (de)
JP (1) JP5413978B2 (de)
KR (1) KR101800347B1 (de)
CN (1) CN102906602B (de)
WO (1) WO2011145613A1 (de)

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KR102149946B1 (ko) 2014-01-10 2020-08-31 엘지이노텍 주식회사 반사방지시트
DE102014104798B4 (de) * 2014-04-03 2021-04-22 Schott Ag Harte anti-Reflex-Beschichtungen sowie deren Herstellung und Verwendung
CN106574982B (zh) * 2014-04-28 2019-09-17 蒙特利尔综合理工学院公司 具有优化的热机械特性、包括钛-有机性质的层的物品
US9057887B1 (en) 2014-05-06 2015-06-16 Blue Light Eye Protection, Inc. Materials and methods for mitigating the harmful effects of blue light
US10191305B2 (en) 2015-12-30 2019-01-29 Signet Armorlite, Inc. Ophthalmic lens
CN105904798A (zh) * 2016-04-25 2016-08-31 苏州普京真空技术有限公司 一种多层复合耐用真空镀膜
JP2020024237A (ja) * 2016-12-14 2020-02-13 コニカミノルタ株式会社 光学製品
JP2020024238A (ja) * 2016-12-14 2020-02-13 コニカミノルタ株式会社 光学素子
JP7216471B2 (ja) * 2017-09-29 2023-02-01 Hoya株式会社 車載レンズ用のプラスチックレンズ及びその製造方法
EP3832378B1 (de) * 2018-07-31 2024-11-13 Hoya Lens Thailand Ltd. Optisches produkt und verfahren zur herstellung davon
CN109143600A (zh) * 2018-09-04 2019-01-04 长春理工大学光电信息学院 一种3d镜片及其制备方法
WO2020251060A1 (ja) * 2019-06-14 2020-12-17 パナソニックＩｐマネジメント株式会社 光学素子

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EP2560031A4 (de) 2013-11-06
WO2011145613A1 (ja) 2011-11-24
EP2560031B1 (de) 2016-05-11
KR20130071431A (ko) 2013-06-28
KR101800347B1 (ko) 2017-11-22
JP5413978B2 (ja) 2014-02-12
CN102906602B (zh) 2016-06-08
US20130050636A1 (en) 2013-02-28
CN102906602A (zh) 2013-01-30
JP2011242697A (ja) 2011-12-01
US9022561B2 (en) 2015-05-05

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